<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script>
        /*TODO:Date和Math
            Date: 日期
                语法: new Date();
            Math: 数学函数
        */
        let date = new Date();
        document.write("当前日期为: "+date +" <br/> ");
        document.write("当前日期为: "+date.toLocaleString()+" <br/> ");
        document.write("当前日期为: "+date.getTime()+" <br/> ");
        document.write(Math.random()+" <br/> ");
        document.write(Math.PI);

    </script>
</head>
<body>

</body>
</html>